Aero Precision Complete Upper Receiver M4E1-T 10.5in 5.56 Barrel 9in M-LOK ATLAS S-ONE Handguard Anodized Black

Aero Precision M4E1-T Complete Upper, 10.5" 5.56 Barrel, 9" M-LOK ATLAS S-ONE HG - AnodizedThis complete upper includes our new ATLAS S-ONE Handguard! The S-ONE line of handguards are designed with size and weight in mind, providing the perfect addition to your lightweight build. Our proprietary ATLAS attachment system is a durable and dependable mounting platform, maintaining a slim profile while still providing the strength and stability customers have grown to love from Aero Precision handguards.Includes:M4E1 Threaded Assembled Upper ReceiverATLAS S-ONE Handguard of choice10.5" 5.56 Carbine Length CMV BarrelLow Profile Gas Block and Carbine Length Gas TubeProduct comes assembledThis complete upper does not include BCG or Charging Handle.The muzzle brake that comes with this complete upper receiver is NOT pinned nor welded to this barrel.M4E1 Threaded Upper Receiver Features:New enhanced forging that gives the upper receiver a "billet look"New picatinny profile that blends seamlessly with our Enhanced Series HandguardsM4 Feedramps.250 takedown pin holesLaser engraved T-marksIncludes port door and forward assist installedATLAS S-ONE Handguard Features:Front and rear picatinny railEliminated center of top rail for weight reductionIndexing grooves in 12:00 position for positive grip controlQuick disconnect sling socket at the 3, 6 and 9 o'clock positionsCompatible with low profile gas blocks1.3" Inside diameter1.5" Outside diameterCompatible with mil-spec AR-15 upper receivers and barrels10.5" 5.56 Carbine Length Barrel Features:Chamber: 5.56Length: 10.5"Twist: 1 in 7Threading: 1/2"x28Material: Chrome Moly VanadiumFinish: QPQ corrosion resistant finish both inside and outGas Block: .750Gas System Length: CarbineWeight: 17.25 ozM4 Barrel ExtensionHP and MPI Tested